Mineral separator



",Dec. 7,1937. J.BRoATcH `-2,101,572

MINERAL SEPARATOR Filed Deo. 20, 1934 /NvENroR L/OHN -BROATCH fMWL A'rroRNEYs Patented Deer?, las? v M UNITED STATES PATENT OFFICE 2,101,572 MINERAL sEPAnATon John Broatch, Vancouver, British Columbia,

` Canada Application December zo, 1934, serial No. 758,523

2 Claims.

eral separators the objects of which are particularly to treat gold bearing black sands or pulps of low Aconcentration in which float `or our gold or other precious meals are present. Further objects are to provide'means for separating line metallic particles from wet pulp, in 'which means no moving parts are'required, and to provide aV ilow, whereby the centrifugal forceof the heavier particles of the pulp in their passage through the duct causes them to contact with `the said adherent, as will be more fully described in the slowly rotated by the following specication and shown in the accom-.'

panying drawing, in which:-

Fig. 1 is a plan view of the invention. Fig. 2 is a sectional view taken on the line 2--2 of Figure 1. I i

Fig. 3 is a plan view of a modified form of the invention providing for continuous Amineral re- I `In the drawing like characters of reference in-` dicate corresponding parts in each ligure.

The numeral I indicates a base havingv a circular step bearing IA, upon which bearing a Icylindrical drum 2 having an internal flange 2A is mounted. The drum is provided on its outer periphery with upper and lower anges 3 and l and a spiral web 5 extending between said anges to define a spiral duct 5. I

Communicating with the upper end of the duct 6 is a feed pipe 1 and communicating with the lower end is anoutlet pipe 8. `Surrounding lthe drum 2 is a casing 9, which is preferably made up of a plurality of curved plates III demountably held in position by pairs `of bridges II, which in turn are forced radially inwards by screws I2 mounted in standards I3. The plates I may be coated on their inner faces with tar or any suitable adherent compound `orv hold similarly covered sheets of I may be used to paper or fabric I4 in contact with the outer 1 periphery of therflanges `3 and 4 and the spiral web 5 to render the duct 6 watertightv and to trap the precious metal.`

per flange 3 is extended and provided with a ring gear I5 which is engaged by a suitablyIdriven worm shaft I6 and the drum 2 is rotatably journalled between a plurality of vertical rollers Il,

In the modiiication shown in Figure3, the up- I sufficient metallic I and feed around the duct 6 structures particularly shown herein.

I (Cl. 209-49) My invention relates to improvements in minand is rotatably supported upon a step bearing IA such as is shown in Figure 2. The inlet and outlet pipes l and 8 are brought to the centre ofthe drum as shown. so that the drum may be Worm shaft I6 and pulp` run continuously through the inlet pipe l, the' duct 6 and the outlet pipe 8. A belt I 8 which is coated with adhesive material as previously described is run between the rollers I'l and the drum, and is kept in firm contact with the spiral web 5 by spring pressed plates I9 which extend between adjacent rollers I1.

In operating the device as shown in Figures 1 and 2, pulp is run through the inlet pipe l, the Vduct 6 and the outlet pipe 8. In passing through the duct its velocity sets up a centrifugal force which causes the precious metals to strike the adhesive coating on the paper I4 or the inner face of the plates Ill if the latter only are employed as a support for the adhesive. When mineral has been entrapped the plates are removed by slackening the screws I2 and the bridges II, when the mineral deposit can be removed by any desired means.,

In the device as shown in Figure 3, the worm shaft I 6 is driven to slowly rotate the drum 2 the belt I8 with its coated side in contact with the web `5. Thedrum would be rotated at such slow speed that the belt having made one complete turn with the drum, would be so coated with metallic particles as to need cleaning, so that as the belt passes outwards from the drum the tar coating and its metallic mineral content arev removed by any suitable means and the metallic mineral recovered. An amalgamating substance may obvious- 1y be substituted for the tarry adhesive aboveA referred to. p

The action relied upon is to pass a stream of pulp around a series of curves or a continuous curve at such speed as will by virtue ofI the pulp ow alone around said curve or curves, set up centrifugal force in the stream to throw the metallic mineral into contact with an outer Iperipheral surface to trap it, consequently it will be apparent that the invention will not be limited, except as expressed in the claims, to the What I claim as my invention is:

1. A` metallic mineral recovery device comf prising a drum having on its outer periphery a spiral duct having an inlet and an outlet, an outer cover for the drum, said cover being adapted to support a beltcoated with a metallic particle entrapping substance at the outer periphery of the duct, means for rotating the drum within axis, a plurality of rollers mounted on vertical the cover, and means for continuously feeding axes about the body, a belt adapted to be passed the belt between the cover and the drum. about the body and held in contact therewith by 2. A metallic minerai recovery device comprissaid rollers, and plates interposed between ad- 5 ing a rotatable cylindrical body having on its jacent rollers adapted to urge the belt into inti- 5 outer periphery a spiral groove, an inlet and an mate contact with the cylindrical body. ioutlet to the groove in alignment with its vertical JOHN BROATCH. 

